JP2005082850A - Method for stabilizing dimension of cylinder block, tool for stabilizing dimension of the cylinder block - Google Patents

Method for stabilizing dimension of cylinder block, tool for stabilizing dimension of the cylinder block Download PDF

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JP2005082850A
JP2005082850A JP2003315518A JP2003315518A JP2005082850A JP 2005082850 A JP2005082850 A JP 2005082850A JP 2003315518 A JP2003315518 A JP 2003315518A JP 2003315518 A JP2003315518 A JP 2003315518A JP 2005082850 A JP2005082850 A JP 2005082850A
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cylinder block
induction heating
frequency induction
cylinder
high frequency
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JP4131217B2 (en
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Hidehiko Monno
英彦 門野
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Toyota Motor Corp
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a method capable of uniformly heating the whole body of a cylinder block with a simple configuration and easily and surely stabilizing the the dimension of the cylinder block. <P>SOLUTION: In the method for stabilizing the dimension of the cylinder block 1 by applying an aging treatment to the cylinder block 1 obtained by inserting a cylinder liner 11 with an aluminum alloy 12, a high frequency induction heating coil 2 is inserted into a bore part 10 in the cylinder block 1, then the high frequency induction heating is applied to the cylinder block 1 through the cylinder liner 11, and simultaneously the tool 5 for suppressing the temperature rising is allowed to abut on a portion 10 of the cylinder block 1 the temperature at which is easily raised by the high frequency induction heating. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

本発明は、シリンダブロックの寸法安定化方法およびその寸法安定化処理用治具に関し、特に、シリンダライナをアルミニウム合金で鋳包んでなるシリンダブロックを時効処理することにより寸法を安定化させる方法、および、シリンダライナをアルミニウム合金で鋳包んでなるシリンダブロックのボア内に高周波誘導加熱コイルを挿入して、前記シリンダライナを介して前記シリンダブロックを高周波誘導加熱することにより寸法を安定化させる処理に用いる治具に関するものである。   The present invention relates to a cylinder block dimensional stabilization method and a dimensional stabilization treatment jig, and in particular, a method of stabilizing a dimension by aging treatment of a cylinder block formed by casting a cylinder liner with an aluminum alloy, and The high frequency induction heating coil is inserted into the bore of the cylinder block formed by casting the cylinder liner with an aluminum alloy, and the cylinder block is used for the process of stabilizing the dimensions by high frequency induction heating through the cylinder liner. It relates to a jig.

近年の内燃機関のシリンダブロックには、アルミニウム合金の鋳造品が用いられるようになっている。このようなアルミニウム合金製のシリンダブロックにおいては、ボア部に所望の耐磨耗性と摺動特性を確保するため、一般に、鋳鉄製や鋼製のシリンダライナを別途用意し、このシリンダライナをアルミニウム合金（鋳造金属）で鋳包んで一体化して成形している。   Aluminum alloy castings have been used for cylinder blocks of internal combustion engines in recent years. In such an aluminum alloy cylinder block, a cast iron or steel cylinder liner is generally prepared separately in order to ensure desired wear resistance and sliding characteristics in the bore, and this cylinder liner is made of aluminum. It is cast and integrated with an alloy (cast metal).

アルミニウム合金からなるシリンダブロックは、一般に、鋳造後にアルミ合金中に過飽和に固溶したＳｉやＣｕが徐々に析出し、０．１％程度の伸びを生じることから、時間の経過により寸法変動が発生する。また、内燃機関のシリンダブロックは、燃焼熱に晒されることから、寸法変動が生じやすい。   In general, cylinder blocks made of an aluminum alloy cause dimensional fluctuations over time because Si and Cu dissolved in a supersaturated state in the aluminum alloy gradually precipitate after casting, resulting in an elongation of about 0.1%. To do. Moreover, since the cylinder block of the internal combustion engine is exposed to combustion heat, the dimensional variation is likely to occur.

シリンダライナを鋳包んでなるアルミニウム合金製のシリンダブロックは、シリンダライナの背面と鋳造ブロックとの密着性が重要であるが、シリンダブロックの寸法変動は両者の密着性を悪化させることとなる。
両者の密着性が悪い場合は、内燃機関の使用中にシリンダライナが変形してボアの真円度が悪化し、オイル（潤滑油）の消費量が増大することになる。そして、この対策として、張力の大きいピストンリングを使用して上述した真円度の悪化に対処することも行われているが、このような対策では、ボア内面を構成するシリンダライナ内面とピストンリングとの間の摩擦抵抗が増大し燃費が悪化する、などの新たな問題が生じることとなる。
そこで、シリンダブロックの寸法変動を事前に完了させて安定化させるため、シリンダブロックを鋳造後に、時効処理を行うことが知られている。従来の時効処理では、例えば鋳造されたシリンダブロックを複数トレー上に載置し、炉内に投入して２００〜２５０℃程度に昇温させ、２時間程度加熱保持するＴ５処理が行われている。 In an aluminum alloy cylinder block formed by casting a cylinder liner, the close contact between the back surface of the cylinder liner and the cast block is important. However, the dimensional variation of the cylinder block deteriorates the close contact between them.
When the adhesion between the two is poor, the cylinder liner is deformed during use of the internal combustion engine, the roundness of the bore is deteriorated, and the amount of oil (lubricating oil) consumed increases. As a countermeasure, a piston ring having a high tension is used to cope with the above-described deterioration of roundness. However, in such a countermeasure, the cylinder liner inner surface and the piston ring constituting the bore inner surface are used. A new problem such as an increase in frictional resistance between the two and a worsening of fuel consumption occurs.
Therefore, it is known to perform an aging treatment after casting the cylinder block in order to stabilize the dimensional variation of the cylinder block in advance. In the conventional aging treatment, for example, T5 treatment is performed in which cast cylinder blocks are placed on a plurality of trays, placed in a furnace, heated to about 200 to 250 ° C., and heated and held for about 2 hours. .

一方、ディーゼル機関のシリンダライナに穿設された冷却孔の開口部近傍の内表面に高周波焼入れを施すことによって圧縮残留応力を付与し、疲労限度を大幅に向上させたことを特徴とするシリンダライナが知られている（特許文献１）。
また、冷却中に配置されたワークの複数箇所に焼入れヘッドで順次高周波焼入れを行なう高周波焼入方法であって、焼入順序の先後に対応して高周波誘導加熱エネルギを後の焼入部になる程小さくする高周波焼入方法が知られている（特許文献２）。 On the other hand, a cylinder liner characterized in that compression residual stress is imparted by applying induction hardening to the inner surface near the opening of a cooling hole formed in a cylinder liner of a diesel engine, thereby greatly improving the fatigue limit. Is known (Patent Document 1).
Also, an induction hardening method in which induction hardening is performed sequentially with a hardening head at a plurality of locations of a workpiece placed during cooling, and the induction heating energy is applied to a later hardening portion corresponding to the earlier of the hardening order. An induction hardening method for reducing the size is known (Patent Document 2).

特開平９‐１８４４５０号公報JP-A-9-184450 特開平９‐３５３１号公報Japanese Patent Laid-Open No. 9-3531

しかしながら、上記従来の時効処理にあっては、シリンダブロック全体のみならずこれを支持するトレーなど炉内全体を昇温させる必要があるため、所定の温度に到達させるのに時間がかかるために電力費などのコストがかかると共に、大型の炉が必要であるために設備投資が多大となるという問題があった。また、従来の時効処理にあっては、炉内の温度を２００〜２５０℃に保持していた。なお、寸法変動の速度は温度に依存する、すなわち温度の関数となるため時効処理に時間がかかるという問題があった。さらに、昇温時間の短縮化を図るために塩浴加熱法や流動床加熱法などがあるが、両法とも熱処理後に塩や流動床媒体の洗浄などが必要となり、さらにコストがかかると共に設備投資が多大となるなどの問題が発生する。   However, in the conventional aging treatment, it is necessary to raise the temperature of not only the entire cylinder block but also the entire furnace, such as a tray that supports the cylinder block, so that it takes time to reach a predetermined temperature. In addition to costs such as costs, there is a problem that a large furnace is required, so that the capital investment becomes large. Moreover, in the conventional aging treatment, the temperature in the furnace was maintained at 200 to 250 ° C. In addition, there is a problem that the aging process takes time because the speed of dimensional variation depends on temperature, that is, is a function of temperature. In addition, there are salt bath heating method and fluidized bed heating method to shorten the heating time, but both methods require washing of salt and fluidized bed medium after heat treatment, which is more costly and capital investment This causes problems such as a large amount.

また、上記特許文献１、２にあっては、いずれのものも高周波誘導加熱によって焼入れを行うものであり、特に特許文献２にあっては、「焼入れ品質の安定化、形成される焼入れ斑の寸法バラツキの低減」を目的としたもので、本発明の時効処理によってシリンダブロック自体の寸法の安定化を図るという目的と全く相違したものである。   Moreover, in the said patent documents 1 and 2, all are what harden | cure by high frequency induction heating, and especially in patent document 2, it is "stabilization of quenching quality and the quenching spots formed. This is intended to reduce dimensional variation, and is completely different from the purpose of stabilizing the dimensions of the cylinder block itself by the aging treatment of the present invention.

本発明は、上述した問題に鑑みてなされたもので、簡単な構成で、シリンダブロック全体を均一に加熱して寸法安定化を容易に確実に行うことができる方法、および、シリンダブロック全体を確実に均一に加熱して寸法安定化を容易に行うことができる治具を提供することを目的とする。   The present invention has been made in view of the above-described problems, and a method capable of easily and reliably performing dimensional stabilization by uniformly heating the entire cylinder block with a simple configuration, and the entire cylinder block. An object of the present invention is to provide a jig that can be uniformly heated by heating uniformly.

請求項１のシリンダブロックの寸法安定化方法に係る発明は、上記目的を達成するため、シリンダライナをアルミニウム合金で鋳包んでなるシリンダブロックを時効処理することにより寸法を安定化させる方法であって、前記シリンダブロックのボア内に高周波誘導加熱コイルを挿入して、前記シリンダライナを介して前記シリンダブロックを高周波誘導加熱すると共に、前記シリンダブロックの高周波誘導加熱による昇温が大きい部分にその昇温を抑制する治具を当接することを特徴とするものである。
また、請求項２のシリンダブロックの寸法安定化処理用治具に係る発明は、上記目的を達成するため、シリンダライナをアルミニウム合金で鋳包んでなるシリンダブロックのボア内に高周波誘導加熱コイルを挿入して、前記シリンダライナを介して前記シリンダブロックを高周波誘導加熱することにより寸法を安定化させる処理に用いる治具であって、前記シリンダブロックの高周波誘導加熱による昇温が大きい部分に当接されてその昇温を抑制するものであることを特徴とするものである。 In order to achieve the above object, the cylinder block dimensional stabilization method according to claim 1 is a method of stabilizing a dimension by aging treatment of a cylinder block formed by casting a cylinder liner with an aluminum alloy. A high-frequency induction heating coil is inserted into the bore of the cylinder block to heat the cylinder block through the cylinder liner, and the temperature of the cylinder block is increased to a portion where the temperature rise due to high-frequency induction heating is large. It is characterized by abutting a jig for suppressing the above.
Further, in order to achieve the above object, the invention relating to the cylinder block dimensional stabilization processing jig of claim 2 inserts a high frequency induction heating coil into the bore of the cylinder block formed by casting the cylinder liner with an aluminum alloy. The jig used for the process of stabilizing the dimensions by high-frequency induction heating of the cylinder block via the cylinder liner, which is in contact with a portion where the temperature rise due to high-frequency induction heating of the cylinder block is large. This is characterized in that the temperature rise is suppressed.

請求項１の発明では、シリンダライナをアルミニウム合金で鋳包んでなるシリンダブロックのボア内に高周波誘導加熱コイルを挿入して通電し、この高周波誘導加熱コイルと対向するように位置するシリンダライナを介してシリンダブロックを高周波誘導加熱により昇温させて、この加熱状態を所定時間保持する。このとき、シリンダブロックの部分によっては、高周波誘導加熱により容易に昇温する部分と、容易に昇温しない部分が生じるが、シリンダブロックの高周波誘導加熱により容易に昇温する部分に治具を当接させてかかる部分の昇温を抑制した状態で高周波誘導加熱を行うことにより、部分によって温度差が生じることなく、シリンダブロックは全体が均一に所定の温度に加熱され時効処理が施されて寸法が安定化する。
また、請求項２の発明では、シリンダライナをアルミニウム合金で鋳包んでなるシリンダブロックのボア内に高周波誘導加熱コイルを挿入して、前記シリンダライナを介して前記シリンダブロックを高周波誘導加熱することにより寸法を安定化させる時効処理を行う。このとき、シリンダブロックには、高周波誘導加熱により容易に昇温する部分と、容易に昇温しない部分が生じるが、治具をシリンダブロックの高周波誘導加熱により容易に昇温する部分に当接させることにより、かかる部分の昇温が抑制された状態で高周波誘導加熱が行われるため、部分によって温度差を生じさせることなくシリンダブロック全体を均一に所定の温度に加熱して時効処理し寸法を安定化させる。 In the first aspect of the present invention, a high frequency induction heating coil is inserted into a bore of a cylinder block formed by casting the cylinder liner with an aluminum alloy and energized, and the cylinder liner is positioned so as to face the high frequency induction heating coil. The cylinder block is heated by high frequency induction heating, and this heating state is maintained for a predetermined time. At this time, depending on the part of the cylinder block, there are a part that easily rises in temperature by high frequency induction heating and a part that does not easily rise in temperature. By performing high-frequency induction heating in a state where the temperature rise of the part is kept in contact with each other, the entire cylinder block is uniformly heated to a predetermined temperature and subjected to an aging treatment without causing a temperature difference between the parts. Is stabilized.
According to a second aspect of the present invention, a high frequency induction heating coil is inserted into a bore of a cylinder block in which the cylinder liner is cast with an aluminum alloy, and the cylinder block is subjected to high frequency induction heating through the cylinder liner. Perform aging treatment to stabilize dimensions. At this time, the cylinder block has a part that easily rises in temperature by high frequency induction heating and a part that does not easily rise in temperature, but the jig is brought into contact with the part that easily rises in temperature by high frequency induction heating of the cylinder block. As a result, high-frequency induction heating is performed in a state in which the temperature rise of the portion is suppressed, so that the entire cylinder block is uniformly heated to a predetermined temperature without causing a temperature difference between the portions, and the dimensions are stabilized by aging treatment. Make it.

請求項１の発明によれば、簡単な構成で、シリンダブロック全体を均一に加熱して寸法安定化を容易に確実に行うことができる。
請求項２の発明によれば、シリンダブロック全体を確実に均一に加熱して寸法安定化を容易に行うことができる治具を提供することができる。 According to the first aspect of the present invention, the entire cylinder block can be heated uniformly with a simple configuration, and dimensional stabilization can be easily and reliably performed.
According to the second aspect of the present invention, it is possible to provide a jig capable of easily performing dimensional stabilization by reliably heating the entire cylinder block uniformly.

最初に、本発明のシリンダブロックの寸法を安定化させるために行う時効処理に用いる治具の最良の形態を、主に図１および図２に基づいて詳細に説明する。なお、図において、同一符号は同様の部分または相当する部分に付すものとする。
本発明は、概略、シリンダライナ１１をアルミニウム合金１２で鋳包んでなるシリンダブロック１のボア部１０内に高周波誘導加熱コイル２を挿入して、シリンダライナ１１を介してシリンダブロック１を高周波誘導加熱することにより寸法を安定化させる処理に用いる治具５であって、この治具５は、シリンダブロック１の容易に昇温される部分１０に当接されてその部分の昇温を抑制するものである。 First, the best mode of the jig used for the aging treatment performed to stabilize the dimensions of the cylinder block of the present invention will be described in detail mainly based on FIG. 1 and FIG. In the drawings, the same reference numerals are given to the same or corresponding parts.
In the present invention, generally, a high frequency induction heating coil 2 is inserted into a bore portion 10 of a cylinder block 1 formed by casting a cylinder liner 11 with an aluminum alloy 12, and the cylinder block 1 is high frequency induction heated via the cylinder liner 11. This jig 5 is used for the process of stabilizing the dimensions, and this jig 5 is brought into contact with the part 10 of the cylinder block 1 where the temperature is easily raised and suppresses the temperature rise of that part. It is.

図１および図２に示すように、内燃機関のシリンダブロック１は、アルミニウム合金１２のみにより構成された図の下方に位置するジャーナル部９と、鋳鉄や鋼鉄などからなる複数のシリンダライナ１１がアルミニウム合金１２で鋳包まれた図の上方に位置するボア部１０と、からなるもので、アルミニウム合金１２には、ＳｉやＣｕなどの成分が過飽和に固溶している。
図２に示すように、高周波誘導加熱コイル２は、シリンダブロック１のボア部１０に鋳包みされたシリンダライナ１１の長さに対応した長さで、シリンダライナ１１の内面と所定の間隔を有する径に成形されてなるもので、所定の高周波電流を供給することが可能な電源に接続されている。そして、高周波誘導加熱コイル２は、これをボア部１０のシリンダライナ１１に対して挿入・退避させるためのアクチュエータに支持されている。
図１および図２に示すように、治具５は、シリンダブロック１のジャーナル部９と反対側に位置するボア部１０の開口端面に当接される熱吸収部５ａと、熱吸収部５ａから側方（図２の左右方向）に延出された熱交換部５ｂと、高周波誘導加熱コイル２を挿通させることが可能な穴部５ｃとを備えてなるもので、例えばＡｌ−Ｃｕなど、熱伝導性が良好な材料により一体に成形されている。熱吸収部５ａは、シリンダブロック１のボア部１０の端面に密着し得る形状に形成されてなるもので、穴部５ｃがボア部１０の開口と対応するように形成されている。熱交換部５ｂは、熱吸収部５ａよりも肉圧に形成されており、その内部には水や油、あるいはエアなどの冷却媒体が供給循環される通路６が形成されている。治具５は、高周波誘導コイル２の移動に伴ってまたは独立してシリンダブロック１のボア部１０の端面に対して当接・退避させるためのアクチュエータに支持されている。なお、治具５の構成は、この実施の形態に限定されることなく、例えば、熱交換部５ｂに冷却媒体供給循環用の通路６を設けることなく、その外側にクーリングフィンを設けて空冷式とすることもできる。 As shown in FIGS. 1 and 2, a cylinder block 1 of an internal combustion engine includes a journal portion 9 that is formed only of an aluminum alloy 12, and a plurality of cylinder liners 11 made of cast iron, steel, and the like. It consists of a bore portion 10 positioned in the upper part of the figure cast in an alloy 12, and components such as Si and Cu are dissolved in the aluminum alloy 12 in a supersaturated state.
As shown in FIG. 2, the high frequency induction heating coil 2 has a length corresponding to the length of the cylinder liner 11 cast in the bore portion 10 of the cylinder block 1 and has a predetermined distance from the inner surface of the cylinder liner 11. It is formed into a diameter and is connected to a power source capable of supplying a predetermined high-frequency current. The high frequency induction heating coil 2 is supported by an actuator for inserting / retracting the high frequency induction heating coil 2 with respect to the cylinder liner 11 of the bore portion 10.
As shown in FIGS. 1 and 2, the jig 5 includes a heat absorbing portion 5 a that is in contact with an opening end surface of the bore portion 10 located on the opposite side of the journal portion 9 of the cylinder block 1, and a heat absorbing portion 5 a. The heat exchange part 5b extended to the side (left-right direction of FIG. 2) and the hole part 5c which can insert the high frequency induction heating coil 2 are provided, for example, Al-Cu etc. It is integrally formed of a material with good conductivity. The heat absorbing portion 5 a is formed in a shape that can be in close contact with the end surface of the bore portion 10 of the cylinder block 1, and the hole portion 5 c is formed so as to correspond to the opening of the bore portion 10. The heat exchanging part 5b is formed with a pressure greater than that of the heat absorbing part 5a, and a passage 6 through which a cooling medium such as water, oil, or air is supplied and circulated is formed. The jig 5 is supported by an actuator for abutting and retreating with respect to the end face of the bore portion 10 of the cylinder block 1 as the high frequency induction coil 2 moves or independently. The configuration of the jig 5 is not limited to this embodiment. For example, without providing the cooling medium supply circulation passage 6 in the heat exchanging portion 5b, a cooling fin is provided on the outer side to provide an air-cooling type. It can also be.

次に、本発明のシリンダブロックの寸法安定化方法の最良の形態を、上述したように構成された治具５を用いる場合によって、図１〜図６に基づいて詳細に説明する。
本発明のシリンダブロックの安定化方法は、概略、シリンダライナ１１をアルミニウム合金１２で鋳包んでなるシリンダブロック１を時効処理することにより寸法を安定化させる方法であって、シリンダブロック１のボア部１０内に高周波誘導加熱コイル２を挿入して、シリンダライナ１１を介してシリンダブロック１を高周波誘導加熱すると共に、シリンダブロック１の高周波誘導加熱により昇温され易い部分１０にその昇温を抑制する治具５を当接するものである。 Next, the best mode of the cylinder block dimensional stabilization method according to the present invention will be described in detail with reference to FIGS. 1 to 6 by using the jig 5 configured as described above.
The cylinder block stabilization method of the present invention is a method of stabilizing dimensions by aging treatment of a cylinder block 1 in which a cylinder liner 11 is casted with an aluminum alloy 12. The high-frequency induction heating coil 2 is inserted into the cylinder 10 and the cylinder block 1 is induction-heated by high-frequency induction via the cylinder liner 11. The jig 5 is contacted.

シリンダブロック１を時効処理してその寸法安定化を図るに際しては、各ボア部１０内に高周波誘導加熱コイル２を挿入し（図３および図４を参照）、高周波誘導加熱コイル２に通電して高周波誘導加熱をする。これにより、高周波誘導加熱コイル２と対向するように位置するシリンダライナ１１が加熱されて温度が上昇し、その熱がシリンダブロック１のアルミニウム合金１２により構成された部分に伝導されて、アルミニウム合金１２に過飽和状態で固溶していたＳｉやＣｕが析出して永久伸びを発生して寸法変動が発生し、アルミニウム合金１２全体に時効処理が施されて、シリンダブロック１の寸法が安定化することとなる。   In order to stabilize the dimensions by aging treatment of the cylinder block 1, a high frequency induction heating coil 2 is inserted into each bore portion 10 (see FIGS. 3 and 4), and the high frequency induction heating coil 2 is energized. Use high frequency induction heating. As a result, the cylinder liner 11 positioned so as to face the high frequency induction heating coil 2 is heated and the temperature rises, and the heat is conducted to the portion formed of the aluminum alloy 12 of the cylinder block 1. Si and Cu, which were dissolved in a supersaturated state, are precipitated to generate permanent elongation, resulting in dimensional fluctuation, and the entire aluminum alloy 12 is subjected to aging treatment, thereby stabilizing the dimensions of the cylinder block 1. It becomes.

ここで、各高周波誘導加熱コイル２が各ボア部１０に挿入されてそのシリンダライナ１１を加熱する。そのため、シリンダブロック１は、ボア部１０が容易に昇温される部分となり（したがって容易に昇温される部分としてもボア部と同じ符号１０を付すこととする）、高周波誘導加熱コイル２から離れシリンダライナ１１が存在しないジャーナル部９が容易に昇温されない部分となる（したがって容易に昇温されない部分としてもジャーナル部と同じ符号９を付すこととする）。また、ボア部１０の間Ｐ（図３）は、互いに隣接する高周波誘導加熱コイル２の磁束が密となるため、特に容易に昇温される部分となる。そのため、図５に示すように、シリンダブロックは、ボア部１０の温度上昇変化Ｂがジャーナル部９の温度上昇変化Ｊよりも高くなり、部分によって温度格差が生じ、部分によって材料特性にバラツキが生じるという問題が発生するおそれがある。   Here, each high frequency induction heating coil 2 is inserted into each bore portion 10 to heat the cylinder liner 11. Therefore, the cylinder block 1 becomes a part where the temperature of the bore part 10 is easily raised (thus, the part 10 where the temperature is easily raised is given the same reference numeral 10 as that of the bore part) and is separated from the high frequency induction heating coil 2. The journal portion 9 where the cylinder liner 11 does not exist is a portion where the temperature is not easily raised (thus, the portion 9 where the temperature is not easily raised is given the same reference numeral 9 as the journal portion). Further, between the bore portions 10 (FIG. 3), the magnetic fluxes of the high-frequency induction heating coils 2 adjacent to each other become dense, so that the temperature is particularly easily increased. Therefore, as shown in FIG. 5, in the cylinder block, the temperature rise change B of the bore portion 10 becomes higher than the temperature rise change J of the journal portion 9, a temperature difference occurs depending on the portion, and material characteristics vary depending on the portion. May occur.

しかしながら、本発明では、シリンダブロック１を高周波誘導加熱して時効処理を行う際に、図１および図２に示したように、治具５の熱吸収部５ａをシリンダブロック１の昇温が容易な部分であるボア部１０の端面に当接し、必要に応じて熱交換部５ｂの通路６に冷却媒体を供給循環して、図６に示すようにボア部１０の温度上昇変化Ｂをジャーナル部９の温度上昇変化Ｊと同様となるように抑制することにより、シリンダブロック１全体が均等に温度上昇変化させて温度格差が生じないように調整する。このようにして全体が略均一な温度で時効処理が行われたシリンダブロック１は、全体の材料特性が均一であるため、確実且つ適切に寸法安定化を容易に図ることができる。   However, in the present invention, when the aging treatment is performed by induction heating of the cylinder block 1, as shown in FIGS. 1 and 2, the temperature of the cylinder block 1 can be easily raised by using the heat absorbing portion 5 a of the jig 5. 6 is brought into contact with the end surface of the bore portion 10 which is a small portion, and a cooling medium is supplied and circulated through the passage 6 of the heat exchanging portion 5b as necessary, so that the temperature rise change B of the bore portion 10 is changed as shown in FIG. 9 is adjusted so that the temperature of the entire cylinder block 1 is changed uniformly and the temperature difference does not occur. The cylinder block 1 that has been subjected to the aging treatment at a substantially uniform temperature in this way has uniform material characteristics as a whole, and therefore can be easily and reliably dimensionally stabilized.

なお、本発明のシリンダブロック１の寸法安定化方法では、高周波誘導加熱によりシリンダライナ１１を介してシリンダブロック１全体をを設定された温度に均一に昇温させることができればよく、高周波誘導加熱機とは別に隣設された炉などの保温手段に移送して、高周波誘導加熱されて上昇した温度を保持するよう構成することもできる。   In the dimension stabilization method for the cylinder block 1 of the present invention, it is sufficient that the entire cylinder block 1 can be uniformly heated to a set temperature via the cylinder liner 11 by high-frequency induction heating. Alternatively, it can be transferred to a heat retaining means such as a furnace provided next to it, and can be configured to maintain the elevated temperature by high frequency induction heating.

本発明のシリンダブロックの寸法安定化に用いられる治具を当接して高周波誘導加熱を行う状態を示す斜視図である。It is a perspective view which shows the state which contact | abuts the jig | tool used for the dimension stabilization of the cylinder block of this invention, and performs high frequency induction heating. 図１の断面図である。It is sectional drawing of FIG. 治具を当接しないと仮定して高周波誘導加熱を行う状態を示す斜視図である。It is a perspective view which shows the state which performs high frequency induction heating on the assumption that a jig | tool is not contact | abutted. 図３の断面図である。FIG. 4 is a cross-sectional view of FIG. 3. 治具をシリンダブロックに当接させないと仮定して高周波誘導加熱を行う場合のシリンダブロックの部分によって温度上昇変化に格差が生じる状態を説明するためのグラフである。It is a graph for demonstrating the state which a difference arises in a temperature rise change by the part of a cylinder block in the case of performing high frequency induction heating on the assumption that a jig | tool is not contact | abutted to a cylinder block. 本発明の治具をシリンダブロックに当接させて高周波誘導加熱を行い、昇温が容易な部分の温度上昇変化を抑制することにより、シリンダブロックの部分によって温度上昇変化に格差が生じない状態を説明するためのグラフである。The jig of the present invention is brought into contact with the cylinder block to perform high-frequency induction heating, and by suppressing the temperature rise change in the portion where the temperature rise is easy, a state in which there is no disparity in the temperature rise change due to the cylinder block portion. It is a graph for demonstrating.

符号の説明Explanation of symbols

１：シリンダブロック、 ２：高周波誘導加熱コイル、 ５：治具、 ９：ジャーナル部（容易に昇温しない部分）、１０：ボア部（容易に昇温する部分）、１１：シリンダライナ、１２：アルミニウム合金
1: Cylinder block, 2: High frequency induction heating coil, 5: Jig, 9: Journal part (part where temperature does not easily rise), 10: Bore part (part where temperature rises easily), 11: Cylinder liner, 12: Aluminum alloy

Claims (2)

シリンダライナをアルミニウム合金で鋳包んでなるシリンダブロックを時効処理することにより寸法を安定化させる方法であって、
前記シリンダブロックのボア内に高周波誘導加熱コイルを挿入して、前記シリンダライナを介して前記シリンダブロックを高周波誘導加熱すると共に、
前記シリンダブロックの高周波誘導加熱による昇温が大きい部分にその昇温を抑制する治具を当接することを特徴とするシリンダブロックの寸法安定化方法。 A method of stabilizing dimensions by aging a cylinder block formed by casting a cylinder liner with an aluminum alloy,
Inserting a high frequency induction heating coil into the bore of the cylinder block to heat the cylinder block via the cylinder liner,
A method of stabilizing a dimension of a cylinder block, wherein a jig for suppressing the temperature rise is brought into contact with a portion where the temperature rise due to high frequency induction heating of the cylinder block is large. シリンダライナをアルミニウム合金で鋳包んでなるシリンダブロックのボア内に高周波誘導加熱コイルを挿入して、前記シリンダライナを介して前記シリンダブロックを高周波誘導加熱することにより寸法を安定化させる処理に用いる治具であって、
前記シリンダブロックの高周波誘導加熱による昇温が大きい部分に当接されてその昇温を抑制するものであることを特徴とするシリンダブロックの寸法安定化処理用治具。 A high-frequency induction heating coil is inserted into a bore of a cylinder block formed by casting the cylinder liner with an aluminum alloy, and the cylinder block is subjected to high-frequency induction heating through the cylinder liner to stabilize the dimensions. Tools,
A cylinder block dimension stabilization processing jig, wherein the cylinder block is brought into contact with a portion where the temperature rise due to high frequency induction heating is large and the temperature rise is suppressed.
JP2003315518A 2003-09-08 2003-09-08 Cylinder block dimension stabilization method and dimension stabilization processing jig Expired - Fee Related JP4131217B2 (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011063830A (en) * 2009-09-15 2011-03-31 Hitachi Ltd Aluminum die-cast product and method for modifying aluminum die-cast product

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011063830A (en) * 2009-09-15 2011-03-31 Hitachi Ltd Aluminum die-cast product and method for modifying aluminum die-cast product

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